Alert archive / Nebraska / Special Weather Statements in 2021

Special Weather Statement, NWS North Platte, NE

April 6, 2021Custer County, Nebraska

NWS North Platte, NE issued this special weather statement at Apr 6, 2021, 7:01 PM CDT for Custer County, Nebraska. It was in force for 29 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 6, 2021, 7:01 PM CDT (00:01 UTC)
Expired: Apr 6, 2021, 7:30 PM CDT
In force: 29 min
Issued by: NWS North Platte, NE

County Custer County, NE

The radar

The North Platte radar (KLNX), 122 km from the middle of the area, began a volume at 00:05 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Apr 6, 7:24 PM CDT	HAIL 1.75	Ansley, NE
Apr 6, 7:28 PM CDT	HAIL 1	Ansley, NE	VIA SOCIAL MEDIA.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.0 hours before the alert went out and 97 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 670 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 173 m²/s²
0-3 km storm-relative helicity: 362 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

As transmitted.

761 
WWUS83 KLBF 070001
SPSLBF

Special Weather Statement
National Weather Service North Platte NE
701 PM CDT Tue Apr 6 2021
 
NEZ038-070030-
Custer NE-
701 PM CDT Tue Apr 6 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN CUSTER COUNTY UNTIL
730 PM CDT...

At 701 PM CDT, Doppler radar was tracking a strong thunderstorm 9
miles south of Berwyn, or 13 miles south of Broken Bow, moving
northeast at 25 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Ansley, Berwyn, Westerville, Burr Oak, Buckeye and Pressey State
Wildlife Management Area.

This includes the following highways...
 Highway 183 between mile markers 84 and 99.
 Highway 2 between mile markers 281 and 299.
 Highway 92 between mile markers 300 and 305.

LAT...LON 4109 9952 4116 9974 4147 9956 4137 9920
      4133 9920
TIME...MOT...LOC 0001Z 218DEG 24KT 4121 9955 

$$

Snively

The office that day

Everything else NWS North Platte, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 6, 7:04 PM CDT	Special Weather Statement	LBF	McPherson	41 min
Apr 6, 7:21 PM CDT	Special Weather Statement	LBF	Cherry	39 min
Apr 6, 7:23 PM CDT	Severe Thunderstorm Warning	LBF	Custer	37 min
Apr 6, 7:30 PM CDT	Special Weather Statement	LBF	Sherman	30 min
Apr 6, 7:30 PM CDT	Special Weather Statement	LBF	Logan, Thomas	45 min
Apr 6, 7:39 PM CDT	Special Weather Statement	LBF	Sherman	36 min
Apr 6, 7:43 PM CDT	Special Weather Statement	LBF	Thomas	47 min
Apr 6, 8:00 PM CDT	Special Weather Statement	LBF	Cherry	45 min
Apr 6, 8:01 PM CDT	Special Weather Statement	LBF	Custer	44 min
Apr 6, 8:23 PM CDT	Special Weather Statement	LBF	Logan, Thomas	52 min
Apr 6, 8:43 PM CDT	Special Weather Statement	LBF	Cherry	47 min
Apr 6, 9:13 PM CDT	Special Weather Statement	LBF	Blaine, Thomas	47 min

Nearby

Special Weather Statements in Nebraska, 2021 Every special weather statement in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.